Understanding the LinkedIn Ecosystem 2013 - an Infographic. This infographic shows the ecosystem of LinkedIn, including how each feature of LinkedIn works together to deliver a promising platform for business growth and advertising. LinkedIn is a social networking website for people in professional occupations. Founded in December 2002 and launched on May 5, 2003, it is mainly used for professional networking. As of January 2013, LinkedIn reports more than 200 million acquired users in more than 200 countries and territories